Kurotowa
Legend
Sounds like we're talking about a Dragon Quest issue Hero of Light type here. Someone who fights well, leads from the front, is the nucleus for the formation of a team with their idealism inspiring others to join the cause, and optionally has a smattering of divine blessings to cement their Chosen One status. That sure sounds like a Paladin to me.
Valor Bards are too focused on enabling others and casting spells. Battlemaster Fighters can be made to work, but more naturally fit the "accomplished warrior" role than the "inspiring leader" one. For those who suggest Hexblade, while I love the class the flavor just runs at a cross grain to what the OP describes. If you want a blessed champion who rallies others to their banner, Paladin has got to be the first choice.
Valor Bards are too focused on enabling others and casting spells. Battlemaster Fighters can be made to work, but more naturally fit the "accomplished warrior" role than the "inspiring leader" one. For those who suggest Hexblade, while I love the class the flavor just runs at a cross grain to what the OP describes. If you want a blessed champion who rallies others to their banner, Paladin has got to be the first choice.